Push button lock



FIG. 1 is a frontal isometric view showing our new lock;

FIG. 2 is a rear isometric view thereof;

FIG. 3 is a side isometric view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a left side elevational thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

The ornamental design for a push button lock, as shown. 